Publikationen

Influence of DVB as linker molecule on the micropore formation in polymer-derived SiCN ceramics

Autor(en)
C. Drechsel, H. Peterlik, C. Gierl-Mayer, M. Stöger-Pollach, T. Konegger
Abstrakt

In this work, the formation of transient microporosity during the polymer-to-ceramic conversion in polymer-derived ceramics was studied using a commercially available poly(vinyl)silazane precursor which was modified with divinylbenzene (DVB) as linker molecule during crosslinking. After pyrolysis treatments between 400 and 700 °C, the resulting materials not only showed distinct changes in elemental composition and structural features upon introduction of the linker molecule, but also a shift in micropore size, e.g. shifting from 0.84 nm to 0.70 nm after pyrolysis at 600 °C. Due to hindrance of transamination reactions in the low-temperature region, the nitrogen content in linker-containing samples was significantly higher, leading to a different composition of micropore-forming entities and, in case of the system studied, to smaller pores. These findings are a first step towards the clarification of the mechanisms leading to the pore formation in PDCs during pyrolytic conversion, which is essential for their use in prospective applications.

Organisation(en)
Dynamik Kondensierter Systeme
Externe Organisation(en)
Technische Universität Wien
Journal
Journal of the European Ceramic Society
Band
41
Seiten
3292-3302
Anzahl der Seiten
11
ISSN
0955-2219
DOI
https://doi.org/10.1016/j.jeurceramsoc.2021.01.051
Publikationsdatum
01-2021
Peer-reviewed
Ja
ÖFOS 2012
103018 Materialphysik, 205009 Keramische Werkstoffe
Schlagwörter
ASJC Scopus Sachgebiete
Ceramics and Composites, Materials Chemistry
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/influence-of-dvb-as-linker-molecule-on-the-micropore-formation-in-polymerderived-sicn-ceramics(5917aaf9-5a21-4885-869d-66c4d2e01789).html